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Topic: how to measure IDY (Read 2217 times)

I cannot figure out how to accurately measure IDY. My scale does not measure amounts below 1 gram.

I have 2 different recipes which call for .5 and .74 grams of IDY. Since I cannot weigh the yeast should I use measuring spoons? I do have a mini set of measuring spoons calleda dash (which is 1/8 tsp ), a pinch and a smidgen. does 1/8 tsp equal .5 grams? can I add a pinch and a dash to equal 3/4 grams?

Measuring by pinches between the forefinger and thumb doesn't sound very reliable to me.

PINCH - A pinch holds 1/2 dash or 1/16 teaspoon. 2 pinches = 1 dashA pinch has historically been defined as "an amount that can be taken between the thumb and forefinger" but without any definite equivalent in other units of measurement.

DASH - A dash holds 1/8 teaspoon. 8 dashes = 1 teaspoonA dash was originally considered a liquid measure, a small but indefinite amount. More recently the term has been used as both a liquid and dry measurement.

Dissolve 10g yeast in 90g water. The solution is now 10% yeast or 0.1g yeast per 1g solution. For .5g yeast, use 5g of the solution. Be sure to lower your formula water by the amount added with the yeast. In the case of this example, it would be 4.5g water. If you want to get to 0.01g accuracy with your yeast, dissolve 1g yeast in 99g water. It's now 1% yeast or 0.01g yeast per 1.0g solution.

Dissolve 10g yeast in 90g water. The solution is now 10% yeast or 0.1g yeast per 1g solution. For .5g yeast, use 5g of the solution. Be sure to lower your formula water by the amount added with the yeast. In the case of this example, it would be 4.5g water. If you want to get to 0.01g accuracy with your yeast, dissolve 1g yeast in 99g water. It's now 1% yeast or 0.01g yeast per 1.0g solution.

Sorry and thanks.....my ratio is the same;just x10 and you are showing Judy how to work with smaller amount to reach her .5g goal.Darn Icehouse!

A scale that only goes to 1g is really only accurate to +/-0.49g. That is, when it it says 1g, it could really be anything from 0.51g to 1.49g. Your way is probably better. The larger the quantity you weigh, the smaller the error relative to the quantity measured. Unless you're making a really small batch, it probably is better to put 10g yeast in 990g water for 1% yeast or 0.1g per 10g solution. You would then use 50g of the solution for 0.5g. This would reduce the possible error by one order of magnitude.

A scale that only goes to 1g is really only accurate to +/-0.49g. That is, when it it says 1g, it could really be anything from 0.51g to 1.49g. Your way is probably better. The larger the quantity you weigh, the smaller the error relative to the quantity measured. Unless you're making a really small batch, it probably is better to put 10g yeast in 990g water for 1% yeast or 0.1g per 10g solution. You would then use 50g of the solution for 0.5g. This would reduce the possible error by one order of magnitude.

Craig.Would you please take a look at the screen shot below. There is something that troubles me and I didn't want to scare Judy off on this measuring situation of her's if it's just something I can't wrap my head around.

Notice in the right metric box I entered .5g for conversion the left US convert box kicks out 0.08247 tsp.Can that be rounded off and just call it 8 hundredths of a tsp. for convenience sake?Now, if a "smidgen" spoon is 0.050 tsp. 1 and 1/2 smidgens would get you close, correct?When you look at the amount of yeast in the ramakin on my scale....how come that amount looks waaay more than 8 thousandths of a teaspoon? 8 thousandths sounds like it should only be a few grains sitting inside of a big ol teaspoon. no?Am I doing something wrong here Craig; thanks for the help!

Craig.Would you please take a look at the screen shot below. There is something that troubles me and I didn't want to scare Judy off on this measuring situation of her's if it's just something I can't wrap my head around.

Notice in the right metric box I entered .5g for conversion the left US convert box kicks out 0.08247 tsp.Can that be rounded off and just call it 8 hundredths of a tsp. for convenience sake?Now, if a "smidgen" spoon is 0.050 tsp. 1 and 1/2 smidgens would get you close, correct?When you look at the amount of yeast in the ramakin on my scale....how come that amount looks waaay more than 8 thousandths of a teaspoon? 8 thousandths sounds like it should only be a few grains sitting inside of a big ol teaspoon. no?Am I doing something wrong here Craig; thanks for the help!

Bob

You mean 8 hundredths, not 8 thousandths right?

In any case, I think that website is off by a factor of about 100%. Last time I checked, 7.0g ADY ~ 2.25tsp. So, 0.5g ~ 0.16tsp (not 0.08 tsp like the website says) ~ 3 smidgens ~ 1 dash.